Black & Decker MB-850 19-Inch Lawn Mower Replacement Blade For Models Mm850 & Cmm1000. Replace Your Blade Regularly For Best Usage Cut Grass Cleanly Designed for long-lasting performance and superior cutting Fits Black and Decker models MM850, MM875, CMM1000, and CMM1200 Measures 19-inches long Fits Black & Decker lawn mowers: #MM850, #MM875, and #CMM1000 Blade length: 19-inches